Spectrum Analyzer


Overview:

Spectrum analyzer is a device used to examine the spectral composition of some electrical, acoustic, or optical waveform. Often, it measures the power spectrum. Spectrum analysis is concerned primarily with characterizing signal components (such as its spurious and harmonic components, modulation, noise, etc.) Spectrum analyzer is used to locate frequencies where microwave energy exists.

There are analogue and digital spectrum analyzers:

  • An analogue spectrum analyzer uses either a variable bandpass filter whose mid-frequency is automatically tuned (shifted, swept) through the range of frequencies of which the spectrum is to be measured or a superheterodyne receiver where the local oscillator is swept through a range of frequencies.
  • A digital spectrum analyzer uses the Fast Fourier Transform (FFT), a mathematical process that transforms a waveform into its frequency components in the spectrum. As a result, computer programs can compute such transforms, and makes audio processing easier. FFTs have applications in much wider fields.

Spectrum analyzer is used in the following areas of measurement analysis:

  • Distortion measurements
    • Distortion in amplifiers
    • Third order intercept measurement
    • Distortion in mixers
    • Distortion in oscillators
  • Modulation measurements
    • Amplitude modulation (AM) measurement
    • Frequency modulation (FM) measurement
  • Pulsed RF measurements
  • Noise measurements
    • Noise figure (NF) measurement
  • Electromagnetic interference (EMI) measurement

Important spectrum analyzer products:

Manufacturer Model Condition Description Specs
Agilent Technologies N9912A 3rd party pre-owned FieldFox RF analyzer N9912A
Agilent Technologies N9912A 3rd party pre-owned FieldFox RF analyzer N9912A
Agilent Technologies E4446A 3rd party pre-owned PSA spectrum analyzer 3 Hz - 44 GHz E4446A
Agilent Technologies E4438C 3rd party pre-owned Not-on-file(other-mfr) E4438C
Agilent Technologies E4438C 3rd party pre-owned Not-on-file(other-mfr) E4438C
Agilent Technologies E4407B 3rd party pre-owned ESA-E 9kHz-26.5 GHz Spectrum Analyzer E4407B
Agilent Technologies E4404B 3rd party pre-owned ESA-E 9kHz-6.7GHz Spectrum Analyzer E4404B
Agilent Technologies E4403B 3rd party pre-owned ESA-L 9kHz-3.0GHz Spectrum Analyzer E4403B
Agilent Technologies E4403B 3rd party pre-owned ESA-L 9kHz-3.0GHz Spectrum Analyzer E4403B
Agilent Technologies E4402B 3rd party pre-owned ESA-E 9 kHz-3.0 GHz Spectrum Analyzer E4402B
Agilent Technologies 8596E 3rd party pre-owned Portable Spectrum Analyzer, 9kHz to 12.8 GHz 8596E
Agilent Technologies 8594E 3rd party pre-owned Portable Spectrum Analyzer, 9 kHz to 2.9 GHz 8594E
Agilent Technologies 8564EC 3rd party pre-owned 9 kHz-40 GHz portable spectrum analyzer 8564EC
Agilent Technologies 8563EC 3rd party pre-owned 9 kHz-26.5 GHz portable spectrum analyzer 8563EC
Agilent Technologies 8561E 3rd party pre-owned Portable Spectrum Analyzer 30 Hz to 6.5 GHz 8561E
Agilent Technologies 8561E 3rd party pre-owned Portable Spectrum Analyzer 30 Hz to 6.5 GHz 8561E
Agilent Technologies Inc. 8562/8563EC 3rd party pre-owned Not-on-file(other-mfr) 8562/8563EC
Agilent Technologies Inc. 8562/8563EC 3rd party pre-owned Not-on-file(other-mfr) 8562/8563EC
Anritsu S820D 3rd party pre-owned Broadband Site Master, 25 MHz to 20 GHz, built-in DTF, k(f) test port connector S820D
Anritsu S810D 3rd party pre-owned Broadband Site Master, 25 MHz to 10.5 GHz, built-in DTF, k(f) test port connector S810D
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Spectrum Analyzers by different manufacturers: